Terminal for electric apparatus.



F. e. KEYES TERMINAL FOR ELECTRIC APPARATUS.

APPLICATION #ILED JUNE 1 6, 1914.

Patent-ed Sept. 12,

S E 8 E m I W UNITED STATES PATENT oFEI E,

FREDERICK e. KEYES, E EAST oEAneE, NEW JERSEY, ASSIGNOR To coorna HEWITT L c'rmo COMPANY, or HOBOKEN, NEW JERSEY, a. qonronarion or. nEw JERSEY.

TERMINAL FOR EL c'rBIo AWL snares.

1 b all xii/a om it may concern Be it known that I, FREDERICK G, KEYEs,

a citizen pf the United States, and resident of East Orange, county of Essex, State of] New Jersey,have invented'certain new and useful Improvements .in Terminals for Vapor Electric Apparatus, of which the following is a specification. T I

The invention herein disclosed is an inn provement on the invention set forth-in my Patent No. 1,079,352, issued November th, 1913.. In the invention disclosed in said patent I employ a seal consisting of a metal tube, usually platinum, passing through a vitreous member sealed to the tube and leading to a chamber inside the main container, wherein I supply an absorbing material interposed'between the interior of thecontainer and a tube for preventing the im pairment or destruction of theeiiiciency of the seal by gradually, absorbing the vapor which may pass through into the absorbent material. In practice the functional life of I such an absorbent material, provided proper precautions are used and even though it be of moderate extent, is in excess of the life of the vapor apparatus as a Whole. The earlier disclosure took the form of granules or powd'er of some metal, such as copner, which amalgamates with the mercury with considerable readiness. By the amalgamation the copper powder or granules absorb the mercury vapor carried through from the interior of the container, and thus hinder the penetration. of mercury vapor by arresting and absorbing the vapor which has already penetrated. In the present inventionI do not employ a powder or granulesof copper for the reason that the same are liable to be too thick or to be blown into the lamp and amalgamate with themercury used in the conducting process. It also appears that quartz or glass absorbs copper at high temperatures. I still make use, however, of the greater tendency of copper to absorb mercury in preference to platinum, but I supply the,- copper in the form of a rod welded to the iron of the leading-in cap or in the form of a spiral surrounding the portion of the latinum tube within the seal.

invention is'illustrated in the accompanying drawings in which- Figures 1 and 2 are vertical sect'ons of 'quartz lampapparatus, each havi g the coherent mass. There is an opening Sp a 9 te Patent Patented Sept. 12, 1916. Application filed June 16, 1914. Serial No. 845,361.

principle of my invention applied thereto in a different way.

In the drawings, is a tube of non-com ducting material which forms part, oi? the container into which current is to be intro- By way of illustration I shades-- duced. sume the container to be fused silica or quartz. y

B is a thin metal tube, usually of platinum. v l

C- is a vitreous member which is secured constructed of to the platinum tube B on the one hand and to the fused silica tube A on the other.

I) isa lead passing through the tube 13 into the leontainer tube A and sealed or otherwise secured to a metal cap-piece E which cap piece is secured to the tube B. The sealing of the cappiece, tube and lead,

is usually performed by a single operation.

The part D which I have described as the lead is really made up of two parts, al-

ready described, the lower part being of copper and the upper part I of iron, the

two being secured together by solder or,

' Y so otherwise at the point H.

.l ietween the copper rod or wire constitutingwhat I have called the lead, and the I chang s, or, I may employ plastic resin,

either natural or artificial, which at high temperatures possesses just enough plasticity to yield to the volume changes imposed by thermal changes of the various parts. It will be recognized, that the barrier material must adapt itself to the shape and di-- mensions of the materials with which it comes in contact without exerting a dangerous or deleterious pressure thereon. The barrier material is here shown at I. This material is held in place by a diaphragm J which may be of a material which is introduced iii-the form of a powder or paste andwhich is readily baked into a more or, less in the diaphragm through which the rod (1 passes and this opening should be slightly larger than. the rod so that it is not engaged there by but slips therein with great freedom. 7

BEST AVAILABLE c Under the conditions deserihedabeve it will be understood that any mercury vapor which passes through the diaphragm in the operation of the apparatus will meet with the mechanical or physical obstruction of ture herein described and the inconveniences arising from the use of the patented device are avoided.

The general females of the apparatus shown in Fig. 2 are the same as those in Fig. 1, but the lead c'onsuts wholly of iron )i'ork and State of New York this and the copper is arranged in the 'form of a spiral generally outf=ide the platinum tube B.

I claim as my invention:

In a vapor electric apparatus, a container, a tubular platinum lead scaled through the wall of the container, :1 rod of solid conducting material inside the platinum lead, and a rod'of copper arrange-il-splrally around the said solid rod;

Signed at New York of June, A. l). 1914.

FREDERICK o. REYES.

Witnesses Wu. H. Caren, v'l u-is. ll; laowxu in the county of Xew 11th day 

